A deputy pulled over the suspect's car after seeing him speed away from the scene of a brush fire in the hills south of Beaumont, according to a statement released by the Sheriff's Department. Arson investigators with Cal-Fire and the Sheriff Department's hazardous-device team were called in to assist with the investigation.

Zackariah William Borynack was arrested on suspicion of possession of explosives, possession of a destructive device and possession of a firearm in the commission of a felony, officials said.

Investigators later secured a search warrant for Borynack's home and "found several items related to the original explosives charges," according to the Sheriff's Department.

Borynack is being held at the Larry Smith Correctional Facility with bail posted at $50,000.